Legacy App Refactoring & Strangler Fig

Strangler fig: reverse-engineer monolith deps, incrementally migrate bounded contexts to modern services with feature-flags, dual-run validation, rollback at every step.

• Strangler fig incremental migration plan
• Gradual bounded-context extraction per sprint
• Dual-run production validation + canary
• Feature-flag cutover per module
• Anti-corruption layer per legacy interface

• Migrate monolith without big-bang rewrite
• Zero downtime during multi-year migration
• Business value delivered incrementally
• Legacy runs parallel until fully replaced